Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e8d4598d3d7fea…

MALICIOUS

PDF

96.3 KB Created: 2021-06-26 18:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 274ac455f93a295e4334a9f26d168d45 SHA-1: 730c096e29d5169a8680213b0dd49774872c6593 SHA-256: d2e8d4598d3d7fea457c9e924457d3e2c8c7c7e4b2635ab7b73612f98bd5e0d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and link farms points to an attempt to redirect users to malicious content, potentially exploiting vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/ftlsbkpol8i62uumntqfti0ijq/35590345545.pdf
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/20664573017.pdf
    • http://akinmedikal.com/uploads/file/97417779525.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/1ea63aaa346f2ec405baf8ae098118d0/60970628867.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/thikhhbdrikpn2d1f44i9legbt/tekepez.pdf
    • http://security-m.jp/tool/images/file/96925950768.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/8f65f7d705d0c7839b90daa3f8d79c28/87373885638.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609573847054f---zidat.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/66d413b0d1a9cfb746ca2851e4d0f71d/13815962759.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a21cd666c67---xusor.pdf
    • https://noriupapildu.lt/ckfinder/userfiles/files/92234200575.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/d0ed99eb60e6414819da30d384d2ce71/wenomamijojuxexamelan.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16085e49a8f266---pumuwepifurulifeloxav.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0ca02cb89---46858244589.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/5uto426imfqot8n3l4ec3o9hg0/nonilezubegekizefaj.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/2b68066b94d7d763c6ddab2d7da76232/85356636753.pdf
    • https://samavetpharm.com/userfiles/files/kuwedelematut.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/b56fc130d16f60f8a4b5b5661d1807d2/vewopupizoguxi.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160855d3cc9900---kalumoxadomisako.pdf
    • http://akssert.com/userfiles/files/67756010466.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/chjjcbc941c6ena9redhkt1ra0/48792653084.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa979b57630---84619261995.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a1691845744---kunaxolelanotut.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85947f303---44374411822.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=mohave+county+ordinances
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011482.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11482 16792 bytes
font_01_sfnt_off00012c94.bin
b3c75d19910c2b28a96198ecedd3062dda943dcd13a40c136690acaa3d8ab02e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C94 17860 bytes
font_02_sfnt_off00015ba2.bin
267208c31adea7594083ccb8217658d8a4707c88905db81ed9561e891522c2c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15BA2 10692 bytes